Zend Signal Handling (see RFC: https://wiki.php.net/rfc/zendsignals)

This needs to go into 5.4 as well, but will wait for Pierre to review win32 situation

# Patch by Lucas Nealan, Arnaud Le Blanc, Brian Shire & Ilia Alshanetsky

1 files changed, 104 insertions, 0 deletions

diff --git a/Zend/zend_signal.h b/Zend/zend_signal.h
new file mode 100644
index 0000000000..bc10132091
--- /dev/null
+++ b/Zend/zend_signal.h
@@ -0,0 +1,104 @@
+/*
+  +----------------------------------------------------------------------+
+  | Zend Signal Handling                                                 |
+  +----------------------------------------------------------------------+
+  | Copyright (c) 2008 The PHP Group                                     |
+  +----------------------------------------------------------------------+
+  | This source file is subject to version 3.01 of the PHP license,      |
+  | that is bundled with this package in the file LICENSE, and is        |
+  | available through the world-wide-web at the following url:           |
+  | http://www.php.net/license/3_01.txt                                  |
+  | If you did not receive a copy of the PHP license and are unable to   |
+  | obtain it through the world-wide-web, please send a note to          |
+  | license@php.net so we can mail you a copy immediately.               |
+  +----------------------------------------------------------------------+
+  | Authors: Lucas Nealan <lucas@php.net>                                |
+  |          Arnaud Le Blanc <lbarnaud@php.net>                          |
+  +----------------------------------------------------------------------+
+
+ */
+
+/* $Id$ */
+
+#ifndef ZEND_SIGNAL_H
+#define ZEND_SIGNAL_H
+
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+
+#ifndef NSIG
+#define NSIG 65
+#endif
+
+#ifndef ZEND_SIGNAL_QUEUE_SIZE
+#define ZEND_SIGNAL_QUEUE_SIZE 32
+#endif
+
+/* Signal structs */
+typedef struct _zend_signal_entry_t {
+	int   flags;          /* sigaction style flags */
+	void* handler;      /* signal handler or context */
+} zend_signal_entry_t;
+
+typedef struct _zend_signal_t {
+	int signo;
+	siginfo_t *siginfo;
+	void* context;
+} zend_signal_t;
+
+typedef struct _zend_signal_queue_t {
+	zend_signal_t zend_signal;
+	struct _zend_signal_queue_t *next;
+} zend_signal_queue_t;
+
+/* Signal Globals */
+typedef struct _zend_signal_globals_t {
+	int depth;
+	int blocked;            /* 0==TRUE, -1==FALSE */
+	int running;            /* in signal handler execution */
+	int active;             /* internal signal handling is enabled */
+	int initialized;        /* memory initialized */
+	zend_bool check;        /* check for replaced handlers on shutdown */
+	zend_signal_entry_t handlers[NSIG];
+	zend_signal_queue_t pstorage[ZEND_SIGNAL_QUEUE_SIZE], *phead, *ptail, *pavail; /* pending queue */
+} zend_signal_globals_t;
+
+#ifdef ZTS
+# define SIGG(v) TSRMG(zend_signal_globals_id, zend_signal_globals_t *, v)
+BEGIN_EXTERN_C()
+ZEND_API extern int zend_signal_globals_id;
+END_EXTERN_C()
+#else /* ZTS */
+# define SIGG(v) (zend_signal_globals.v)
+extern ZEND_API zend_signal_globals_t zend_signal_globals;
+#endif /* not ZTS */
+
+# define SIGNAL_BEGIN_CRITICAL() 	sigset_t oldmask; \
+	zend_sigprocmask(SIG_BLOCK, &global_sigmask, &oldmask);
+# define SIGNAL_END_CRITICAL()		zend_sigprocmask(SIG_SETMASK, &oldmask, NULL);
+
+void zend_signal_handler_defer(int signo, siginfo_t *siginfo, void *context);
+void zend_signal_handler_unblock();
+void zend_signal_activate(TSRMLS_D);
+void zend_signal_deactivate(TSRMLS_D);
+void zend_signal_startup();
+void zend_signal_shutdown(TSRMLS_D);
+ZEND_API int zend_signal(int signo, void (*handler)(int) TSRMLS_DC);
+ZEND_API int zend_sigaction(int signo, const struct sigaction *act, struct sigaction *oldact TSRMLS_DC);
+
+#ifdef ZTS
+#define zend_sigprocmask(signo, set, oldset) tsrm_sigmask((signo), (set), (oldset))
+#else
+#define zend_sigprocmask(signo, set, oldset) sigprocmask((signo), (set), (oldset))
+#endif
+
+#endif /* ZEND_SIGNAL_H */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ */